Avoid Using These Outdated Linux Commands

Throughout my years working with Linux, I've seen many commands and programs become obsolete. While it may seem surprising that commands could be deprecated, understanding the reasons behind it reveals why it's logical.

Commands are often retired for several reasons, including improvements in functionality, efficiency, and security. Even if you've relied on a specific command for decades, there may be a newer alternative that outperforms it in every way.

Replace ifconfig with ip

Among deprecated commands, ifconfig is perhaps the most noteworthy. In the past, it was essential for managing network settings and information. However, since it was part of the obsolete net-tools package, it has been phased out.

The ip command serves as a more powerful replacement for ifconfig, offering all the functionality you need for network configuration.

Swap iwconfig for iw

Iwconfig, used for managing wireless networks, became outdated due to the limitations of the Wireless Extensions interface. The modern alternative, iw, uses the nl80211 interface, which supports the latest wireless technologies.

Switch scp to rsync

Previously, scp was the go-to command for securely transferring files over SSH. However, it has security vulnerabilities and has not been maintained. More secure options like SFTP and rsync are recommended for file transfers.

Use grep Instead of egrep/fgrep

Both egrep and fgrep were created as extensions of the grep command, which is crucial for searching text. However, their functionalities have been integrated into grep, rendering the older variants unnecessary.

Choose ss Over netstat

Netstat, once used for displaying network connections and statistics, is now obsolete. It has been replaced by the iproute2 suite, with ss providing faster and more detailed network information.

Move from route to ip

The route command for managing the IP routing table is another casualty of the net-tools package deprecation. It has been succeeded by the more capable ip route command.

Transition from arp to ip neighbor

Arp handled the Address Resolution Protocol cache but was discontinued along with net-tools. Its replacement, ip neighbor, offers enhanced performance and features like faster fault detection.

Although you might find these deprecated commands on your system, it's wise to install and use the modern equivalents to leverage their improved capabilities.